US2820815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricating compositions and process for their preparation
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-04-08
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Granted: 1958-01-21
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Expires: 1974-04-08
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Matuszak
- 👤 Daniel S Maisel
- 👤 Carrier E Wendell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/08; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/04; C10M2207/046; C10M2207/28; C10M2207/282; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/109; C10M2209/11; C10M2209/111; C10M2209/112; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR THE PREPARATION OF COMPLEX ESTER SYNTHETIC LUBRICANTS HAVING IMPROVED THIXOTROPIC CHARACTERISTICS WHICH COMPRISES THE STEPS OF ESTERIFYING AT LEAST ONE MOL OF A POLYOXYALKYLENE GLYCOL WITH AT LEAST TWO MOLS OF AN ALIPHATIC DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ADIPIC, SUBERIC, AZELAIC AND SEBACIC ACID AND EXCESS OF TWO MOLS OF AN ALIPHATIC MONOHYDRIC ALCOHOL HAVING FROM 4 TO 10 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF AN ESTERIFICATION CATALYST AND IN THE PRESENCE OF FROM 25% TO 75% BY WEIGHT, BASED ON THE WEIGHT OF THE TOTAL PRODUCT, OF A C4 TO C10 ALKYL DIESTER OF SAID ALIPHATIC DICARBOXYLIC ACID.
Claim 2
Dependent Claim
107 words
A PROCESS FOR THE PREPARATION OF COMPLEX ESTER SYNTHETIC LUBRICANTS HAVING IMPROVED THIXOTROPIC CHARACTERISTICS WHICH COMPRISES THE STEPS OF ESTERIFYING AT LEAST ONE MOL OF A POLYOXYALKYLENE GLYCOL WITH AT LEAST TWO MOLS OF AN ALIPHATIC DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF ADIPIC, SUBERIC, AZELAIC AND SEBACIC ACID AND EXCESS OF TWO MOLS OF AN ALIPHATIC MONOHYDRIC ALCOHOL HAVING FROM 4 TO 10 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF AN ESTERIFICATION CATALYST AND IN THE PRESENCE OF FROM 25% TO 75% BY WEIGHT, BASED ON THE WEIGHT OF THE TOTAL PRODUCT, OF A C4 TO C10 ALKYL DIESTER OF SAID ALIPHATIC DICARBOXYLIC ACID.
References Cited (Backward Citations)
US2703811A
Cited
US2232674A
Cited
US2392621A
Cited
US2405967A
Cited
US2575195A
Cited
US2575196A
Cited
US2499983A
Cited
US2695279A
Cited
US2666781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |